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Helen [10]
3 years ago
9

Solve the equation 5x-8=57

Mathematics
2 answers:
Snezhnost [94]3 years ago
4 0
5x-8=57

add 8 to both sides

5x=65

divide both sides by 5

x=13
oksano4ka [1.4K]3 years ago
3 0

Answer:

X = 13

1. Add 8 to both sides of the equation

5

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Find the probability of spinning each of the following. P(a factor of 12)
solong [7]
Factors of 12 = 1, 2, 3, 4, 6, 12
P(a factor of 12) = 5/8 = 62.5%
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3 years ago
A student got 78 marks out of a possible 120. Express the students mark as a percentage
statuscvo [17]

Answer:

65%

Step-by-step explanation:

78/120=13/20

13/20=65/100

65/100=65%

8 0
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Read 2 more answers
ben used 124.7 pounds of gravel in his front yard 110.7 pounds in his back yard.how many more pounds of gravel does ben use in h
Dovator [93]

Answer:

30.1

Step-by-step explanation:

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6 0
3 years ago
Find the reference angle of 13π/5
Mars2501 [29]

Answer:

2π/5

Step-by-step explanation:

8 0
3 years ago
SOLVE EACH SYSTEM USING SUBSTITUTION
NNADVOKAT [17]
1. since the equations equal each other 
2x+19=x+7
-x        -x
x+19=7
  -19  -19
x= -12
sub into y= x+7
y= -12+7
y= -5

2. x+2y=-7
<span>x+y+23=0
i don't know what the second equation is equal to, i'll assume 0

2y=x-7
y=1/2x-7/2
sub this into x+y+23=0
x+1/2x-7/2+23=0
3/2x+39/2=0
       -39/2   -39/2
3/2x= -39/2
x=-39/2 / 3/2
x= -13
sub into y=1/2x-7/2
y=1/2(-13)-7/2
y= -10

3. </span>x+5y=2
<span>x=-4y+5
</span>sub x=-4y+5 into x+5y=2
-4y+5+5y=2
y+5=2
  -5  -5
y= -3
sub y =-3 into x =-4y+5
x=-4(-3)+5
x= 17

4. 3x+y=9
<span>y=-5x+9
</span>sub -5x+9 into 3x+y=9
3x+(-5x+9)=9
3x-5x+9=9
-2x+9=9
     -9  -9
-2x=0
x=0
sub into y=-5x+9
y=-5(0)+9
y=9

3 0
3 years ago
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